Make PM2 worker memory restart opt-in

.env.example

@@ -31,7 +31,9 @@ STRATUM_PORTS=3333,3332,3331,3330
 # Optional PPLNS-mode SV1/SV2 autodetect ports.
 #PPLNS_STRATUM_PORTS=
 STRATUM_WORKERS=2
-STRATUM_WORKER_MAX_MEMORY_RESTART=4096M
+# Optional PM2 per-worker memory recycle. Leave unset unless you accept PM2
+# restarting workers when this limit is reached.
+#STRATUM_WORKER_MAX_MEMORY_RESTART=4096M
 STRATUM_MIN_DIFFICULTY=1
 STRATUM_SOCKET_TIMEOUT_MS=3600000
 STRATUM_TCP_KEEPALIVE_INITIAL_DELAY_MS=60000

ecosystem.config.js

@@ -4,6 +4,12 @@ const dockerLogConfig = {
   merge_logs: true,
 };
 
+const stratumWorkerMemoryLimit = process.env.STRATUM_WORKER_MAX_MEMORY_RESTART;
+const stratumWorkerMemoryRestart =
+  stratumWorkerMemoryLimit && !['0', 'false', 'off', 'disabled'].includes(stratumWorkerMemoryLimit.toLowerCase())
+    ? { max_memory_restart: stratumWorkerMemoryLimit }
+    : {};
+
 module.exports = {
     apps: [
       // API instance
@@ -42,7 +48,7 @@ module.exports = {
         script: './dist/main.js',
         instances: parseInt(process.env.STRATUM_WORKERS || '2', 10),
         exec_mode: "cluster",
-        max_memory_restart: process.env.STRATUM_WORKER_MAX_MEMORY_RESTART || '4096M',
+        ...stratumWorkerMemoryRestart,
         env: {
           MASTER: 'false',
           API_ENABLED: 'false',